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Crawl Space Repair & Encapsulation

Crawl space repair and encapsulation ensures your South Carolina home remains safe, stable, and dry. Enhance indoor air quality and create a healthier home environment with tailored repairs from Mount Valley Foundation Services.

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Notice musty odors or sagging, uneven floors? These signs often point to crawl space foundation problems. Many southern homes in Charleston, Columbia, Greenville, and Savannah were built with crawl space foundations to elevate the house from the ground. However, these spaces can become volatile environments, potentially causing structural damage and health risks due to mold growth and pest infestations.

Are you curious whether basement crawl space encapsulation is right for your home? While the term might sound logical, there isn’t actually a basement crawl space encapsulation process because basements and crawl spaces are two distinct foundation types. Crawl spaces are small, vented, or sealed spaces beneath your home, while basements are larger, enclosed areas. Encapsulation applies to crawl spaces, addressing moisture, mold, and structural concerns.


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Causes of Crawl Space Damage

Crawl space foundation issues often stem from construction practices during the home's initial build. Additional causes of crawl space foundation damage include:

Crawl spaces typically have dirt crawl floors that are not covered. Simply placing a 6-mil plastic liner on the floor, which is a minimal code requirement, will not cut it. This liner is thin, allows water and moisture to collect, mold to grow and thrive, and leads to a variety of damage. Other liners with thicknesses of 10 and 12-mil are only slightly better, but they still can easily tear and fail.

Water and moisture also can have a significant impact inside your home, as well. If you have a dirt crawl space with open vents, this allows outside air, water, and pests inside the crawl space directly underneath your house to cause a host of problems. More than 50% of the air you’re breathing indoors comes from below-grade areas like crawl spaces. So, whatever is in your crawl space such as mold, moisture, and humidity, also is in the rest of your house and affecting you.

One example of a structural impact is with the support system under your house. If wooden support systems become saturated with water or exposed to high humidity and excessive moisture, they can rot and buckle. Metal supports also will corrode and rust in the same conditions. All this then leads to sagging, uneven floors and problems with hardwood floors. 

The stack effect is the airflow pattern in your house from bottom to top. Air pressure also comes into play. Air flows from areas of high pressure to areas of low pressure. When there is a greater difference between indoor and outdoor temperatures, the more significant this airflow becomes.

True, you can’t actually see airflow, but it might be helpful to have a way to visualize the stack effect to better understand it. Your home certainly is not located in the northern portion of the country, but a lot of good information can be gained from The Cold Climate Housing Research Center’s YouTube videos, including “Your Nothern Home: Stack Effect” that illustrates the stack effect. 

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Anderson Pusey came and inspected our crawl space . He was prompt,courteous and thorough. He did a great job explaining the entire…

Anderson Pusey came and inspected our crawl space . He was prompt,courteous and thorough. He did a great job explaining the entire process, Mike Prenger

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Phil came out and walked us through what our issues were and was very professional, explained the next steps and scheduled the project. The …

Phil came out and walked us through what our issues were and was very professional, explained the next steps and scheduled the project. The project was finished today and the crew was very professional and did a great job… very happy.

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Mount Valley Foundation concrete lifting team came today and lifted my floor in my Florida Room. They did a fantastic job. Thank the guys …

Mount Valley Foundation concrete lifting team came today and lifted my floor in my Florida Room. They did a fantastic job. Thank the guys for me. This completes my projects with Mount Valley.

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We had a wonderful experience with Zach from Mount Valley Foundation Services. He arrived on time, was very professional, and took the time …

We had a wonderful experience with Zach from Mount Valley Foundation Services. He arrived on time, was very professional, and took the time to carefully inspect everything without rushing. Zach explained the condition of our foundation clearly and honestly, answering all of our questions with patience. We truly appreciated his transparency and the way he made us feel informed and comfortable throughout the entire appointment. It’s not easy to find people who are both knowledgeable and trustworthy, but Zach definitely stands out. Highly recommend him and the company!

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I had an appointment with Mr Edwardson and he arrived on time. After explaining what I needed he spent the time to draw up a plan with 3…

I had an appointment with Mr Edwardson and he arrived on time. After explaining what I needed he spent the time to draw up a plan with 3 different scenarios. We sat down. And he discussed all of the options along with the various payment plans. I would highly recommend this company and specifically Mr Edwardson.

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Brandon Baker was friendly, efficient, and professional. His crew did a great job. I highly recommend them.

Brandon Baker was friendly, efficient, and professional. His crew did a great job. I highly recommend them.

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Jerrod, Antoin & Alex did an excellent job adding a steel support beam to our kitchen floor. The floor feels much more secure under the…

Jerrod, Antoin & Alex did an excellent job adding a steel support beam to our kitchen floor. The floor feels much more secure under the weight of all the kitchen appliances and everything is nice and level (level as it can be for a 1950s home). Thank you!

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Yesterday Mt Valley did foundation work for us. The following guys did a great job:Dondre Pondexter, Patrick Escwien and Scott Wingard….

Yesterday Mt Valley did foundation work for us. The following guys did a great job:Dondre Pondexter, Patrick Escwien and Scott Wingard. Scott kept us informed during the whole process. They went above and beyond to fix some issues caused by duct work done the day before. I highly recommend this company. Todd Lee did the estimate and came by also to check on the job. Thanks Todd.

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Lucas and team did a great job.

Lucas and team did a great job.

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Excellent, knowledgeable, reliable, dedicated, honest, trustworthy service and proficiency in managing foundation repair, restructuring,…

Excellent, knowledgeable, reliable, dedicated, honest, trustworthy service and proficiency in managing foundation repair, restructuring, reinforcing, and stabilization! Friendly, courteous, and respectful service that will also span years of followup care, hereinafter. These are very qualified individuals, and they were good at their tasks and responsible to manage the care of my home! I would recommend them to anyone!!! Let me also spotlight Jalen, Garrett, and Hunter, the three men that accomplished all of the above-mentioned labor and results! They were terrific people to deal with, too, and I think I may have made some long-term friends in the process as we interacted well together!!! Let me likewise highlight the initial phase of getting the financing approved and writing the contract and getting the engineering in progress and orchestrating the whole project, all that was done by Carlton, who was tremendous in working all of this out! I am blessed to have had his assistance to manage this needful repair!!!

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Chris Knight and Devin Camacho did an excellent job fixing a floor that was at risk of collapse. They were attentive to detail and…

Chris Knight and Devin Camacho did an excellent job fixing a floor that was at risk of collapse. They were attentive to detail and recommended an important change to avoid a possible disaster. They were personable and professional.

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Installation of sump pump and drainage system to expel ground water seepage. The entire team from initial contact through installation was…

Installation of sump pump and drainage system to expel ground water seepage. The entire team from initial contact through installation was a professional and accommodating as I have ever encountered. We were completely satisfied with the cost involved. It was more than fair given the services rendered. Davd E and Kim R

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We had some issues with scheduling but once the crew was on site it went very well. This was a more involved job than normal. Yiannis and…

We had some issues with scheduling but once the crew was on site it went very well. This was a more involved job than normal. Yiannis and his partner explained what they were doing and got the job done quickly. Thank you guys for fixing my sidewalk!!

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I had a fantastic experience working with Kevin A and Michel M from Mount Valley Foundation Services. He made everything incredibly easy to …

I had a fantastic experience working with Kevin A and Michel M from Mount Valley Foundation Services. He made everything incredibly easy to understand. I had water coming through my foundation.

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Mount Valley completed a driveway repair which involved foam lifting of sections that had settled as much as 2-3 inches. Clearly having…

Mount Valley completed a driveway repair which involved foam lifting of sections that had settled as much as 2-3 inches. Clearly having great expertise, Yiannis went above and beyond to make sure that no tripping hazards remained by beveling some of the edges. I would highly recommend Mount Valley Foundation.

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Had a large issue with our foundation on one side of our house. Patrick cane and gave us an estimate and walked us through the process….

Had a large issue with our foundation on one side of our house. Patrick cane and gave us an estimate and walked us through the process. They were able to get us scheduled really quickly and Jerrod, Antino and Tevin did an amazing job with the repair. Our sloping floors are now even again! Would definitely recommend them to anyone.

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Oscar and his crew of Billy, Eli and Cameron worked hard to do the assigned work on our home. It was a difficult job in the heat of summer,…

Oscar and his crew of Billy, Eli and Cameron worked hard to do the assigned work on our home. It was a difficult job in the heat of summer, but they never complained. They were always kind and respectful. Oscar explained the process as they progressed through four days. We say "thank you" to all.

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Jerrod and his crew were fast and efficient and explained anything I asked him about quickly to me. I was very impressed with the…

Jerrod and his crew were fast and efficient and explained anything I asked him about quickly to me. I was very impressed with the professionalism and quality of work that was done to my home

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Workers were very good,(Ron, Koby, and Jacob. Knowledgeable, polite, on time.

Workers were very good,(Ron, Koby, and Jacob. Knowledgeable, polite, on time.

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Ok I’ve tried several time to create more than one review but it’s not allowing me too so this will be for both Alex and Rodreck. They…

Ok I’ve tried several time to create more than one review but it’s not allowing me too so this will be for both Alex and Rodreck. They both did a great job putting in our French drain. We really appreciate their hard work. Thank you for getting it done for us and we will definitely reach back out to Mountain valley if we ever need any foundation issues in the future. And they both deserve a 10. Thanks so much. The Kirkbrides

Is Crawl Space Repair and Encapsulation Right for Me?

Open crawl space vents were initially designed to improve airflow. However, these vents often cause more harm than good. Instead of reducing moisture, vents allow humid air infiltration, leading to condensation, mold, and wood rot. 

The humid climates in South Carolina, North Carolina, and Georgia exacerbate these problems, weakening home structures and creating health risks.

Investing in professional crawl space repair and encapsulation solutions, including vapor barriers, vent covers, interior drainage systems, sump pumps, and dehumidifiers, helps combat these issues. Contact Mount Valley Foundation Services today to schedule your free inspection and learn more about creating a safer, healthier environment for your family.

Crawl Space Repair FAQs

We are committed to your satisfaction and your home’s safety. That is why we only use the very best repair solutions. The products we use are manufactured right here in the United States, and they are tested and proven to effectively work in keeping your crawl space clean, dry, safe and healthy. All these solutions also are designed to work together to give you the most bang for your buck and prevent any further problems. 

Here is how we tackle crawl space problems, as well as the solutions we use and how they work: 

  • Address Leaking Water — To address seeping water, we first need to catch the water, then get this water to a sump pump system, and then send this water away from the home.  

    Our specially designed CrawlDrain™ perimeter drainage system is placed in the dirt crawl space floor around the perimeter to catch seeping water from the walls and floor. The drainage channels then direct this water into the SafeDri™ Crawl Space Sump Pump System, which then pumps the water out of the crawl space and away from the home.  A FreezeGuard™ also can be attached to the exterior sump pump discharge line to prevent flooding if the line should freeze or become blocked. 
  • Seal the Crawl Space from Outside Elements — It is important to seal your crawl space from outside air, water and pests. The first step is having durable vent covers placed over the crawl space vents. 
     
    Then, a heavy-duty moisture and vapor barrier is installed. Our CrawlSeal™ is a true 20-mil liner rated above 25-mil strength at the seams. This liner, which is three times thicker than builder’s grade liner, is used to completely isolate the crawl space from the earth. CrawlSeal™ prevents moisture and vapor intrusion, is waterproof, and has been treated to resist mold. 
     
    Additionally, thick drainage matting can be placed on the crawl space floor before the encapsulation process to help direct water to the perimeter CrawlDrain™ system, as well as enhance the strength of the CrawlSeal™ liner. 
     
  • Properly Insulate the Crawl Space — Rigid ExTremeBloc™ panels placed on crawl space walls will better insulate the area and will not fail or develop mold like fiberglass insulation. These panels resist moisture, and an integrated termiticide is added to deter termites below grade. CrawlSeal™ also helps insulate the crawl space, and spray foam can be added to rim joists to seal gaps around the perimeter of your foundation. These insulation methods help prevent wood rot and enable termite treatments. 
     
  • Condition the Air — Our low-profile crawl space dehumidifier is powerful and energy efficient. It effectively works to clean and filter the air, control moisture and humidity, and reduce odors and potential mold growth. This dehumidifier also is self-draining, meaning there aren’t any reservoirs or buckets to have to worry about emptying. The unit can be directed to drain into the crawl space perimeter drainage system or sump pump system, or a condensate pump can be installed. 
     
  • Reinforce Support Systems — Wooden floor supports and light-duty jack posts commonly fail in wet and humid crawl spaces. Our durable IntelliJacks™ are made of galvanized steel, making them more reliable supports that can stabilize and lift sagging floors and floor joists back to level. 

When you contact us, you can speak to one of our customer care representatives about your crawl space concerns. We will then work with you to schedule an appointment for a free inspection and estimate with one of our certified field inspectors.  

Here’s what you can expect during this consultation. The inspector will:  

  • Complete a thorough evaluation of your home’s interior and exterior. This includes going into the crawl space to check the condition of the area including any water intrusion, damage, pests, etc.  
  • Discuss his findings with you, as well as your goals with a repair project.  
  • Offer customized solutions that best fit your repair needs.  
  • Provide you with a proposal of recommended solutions before leaving your house.  
  • Discuss payment and financing options with you. 

Then, if you decide to move forward with a repair project, we will work to schedule your repairs with one of our highly trained installation crews. Our crew members will treat your home as their own, with the utmost care and respect. They will use world-class solutions for your repairs, and their work is not complete until you are 100% satisfied with the job. If something crops up after installation, we will return to fix any issues. We also offer various service and maintenance opportunities to protect our work and your home.  

Along with writing a review about your experience with us, it would mean the world to us if you would refer us to your friends and family! 

Now that you’ve seen what nastiness could be lurking underneath your feet and the toll it can take on your home and your family, aren’t you motivated to get rid of it? As tempting as it might be to head out to your local home improvement store to gather supplies, pause for a moment.  

Crawl space repair is not something you can tackle in a weekend, no matter how handy you are. A lot can go wrong, and we have seen many problems result from fast fixes. Especially concerning real estate transactions, quick fixes can raise red flags. You’ll then have to spend more time and money to repair these issues. It’s best to leave these projects to professional contractors so the problems will be fixed correctly the first time around. 

We encourage you to educate yourself to make the best decision and sound investment with trustworthy repair solutions from a reliable contractor. 

Why would you want disgusting conditions underneath your home? That alone should be enough for you to want to correct the problems. But you might be wondering, “what’s in it for me?” A lot, actually. There are so many benefits of having a clean crawl space, which you can read about in our blog, “10 Reasons to Clean Your Crawl Space This Season.” Here are a few of the major perks:  

  • Health — A cleaner crawl space means improved health for you and your family. Especially if anyone in your house suffers from asthma or allergies, a cleaner crawl space can help prevent flare-ups and sickness. If you choose solutions like a dehumidifier, the air quality will be greatly improved throughout the entire home. 
  • Structural Integrity — Compromised support systems and sagging floors are dangerous and could result in significant structural damage and safety hazards. By shoring up the support system in your home, you will have a more stable living environment for your family. 
  • Energy Efficiency — When you invest in proper, reliable crawl space encapsulation and insulation to reduce energy loss, you can save between 30 and 50% on your energy bills. (Source: Clean Crawls)
  • Functional Space — Once your crawl space has been properly waterproofed, sealed and insulated, you have an area of your home you can use in a new way. You’ll be able to store your belongings in the crawl space without worrying about them being damaged by water, mold or pests. 
  • Real Estate Value — There are a lot of factors that impact a home’s resale value, but issues with the structure, any water intrusion and crawl space problems are all areas you need to be aware of. When selling your house, it is important to disclose any known past or current damage. This sets clear expectations regarding the quality and condition of the home. Homeowners selling their house in South Carolina are required to provide a written disclosure statement to the purchaser noting any known defects. This includes information on the foundation, basement and other structural components, as well as current or prior infestations of wood destroying insects or organisms. (Source: Nolo

If you take a look online for instructions on how to fix your crawl space vapor barrier, you will find there are many DIY tutorials available. Many homeowners think installing a vapor barrier will not take long and won’t be too complicated. After all, it is possible to purchase all the materials you need to do it yourself at your local expert supply store. 

At Mount Valley Foundation Services, we have installed many crawl space vapor barriers over the years. We can tell you that this is not an easy task, and it is not something that many people can figure out just by watching an online tutorial. If anything goes wrong or you make a mistake, you will still have to contact a professional to complete the task. Therefore it is best to contact our team and have your new vapor barrier installed by members of the oldest foundation services companies in all of South Carolina. 

Contractors once believed that placing vents on the walls of crawl spaces would help improve the airflow in these dark and humid areas. But over the years, we have learned that crawl space vents do more harm than good. They allow moisture to enter into the crawl space, which can promote mold growth and affect the internal temperature of your home, causing your energy rates to rise. 

Crawl space vent covers are the ideal solution to this problem, and they do not take long for our professionals to install. Our crawl space vent covers are made from solid and durable materials, and they are designed to prevent moisture and pests from entering your crawl space. 

If you think you could benefit from installing our vent covers, get in touch with us at Mount Valley Foundation Services today. 

Why Crawl Space Repair and Encapsulation Are Needed

Crawl space problems affect your home and your family. Here are just a few of the benefits of crawl space repair and encapsulation:

Avoid Exposure to the Elements

Vented crawl spaces are exposed to the region’s exterior elements, including summertime heat and humidity, year-round precipitation, and coastal storms. Crawl spaces can sustain flooding and moisture-related damage. However, your crawl space can withstand the harshest weather challenges with airtight vent covers and encapsulation solutions.

Prevent Structural Damage and Instability

Crawl space foundations rely on support systems of beams, girders, and floor joists. Excess water and moisture can lead to wood rot and attract pests like termites, which damage these wooden structures. These issues often result in sagging or uneven floors. Crawl space repair and encapsulation manage moisture and protect these critical supports while specialized support jacks stabilize, reinforce, and lift sagging floor joists.

Deter Pests

Pests and rodents are attracted to isolated, dark, moist areas like crawl space foundations. Managing moisture with crawl space repair and encapsulation solutions, including airtight vent covers, door installation, vapor barriers, and durable insulation panels, reduces pest infestations and damage.

Crawl Space Repair and Encapsulation Tips and Mistakes

Mistakes to Avoid:

  • Using Sand and Fans: While sand can absorb liquid, spreading it in a crawl space only conceals the issue by covering the moist ground soil. This method does not remove the moisture or address its source. Similarly, installing fans to circulate air may seem helpful; however, it often exacerbates the problem by increasing the presence of unconditioned, humid air.
  • Investing in Improper or Partial Encapsulation: Saving money on repairs for a rarely seen crawl space area can be tempting, but using reliable products is crucial. Some companies or hardware stores sell liners covering only the floor or walls, not the entire crawl space area. Many retail outlets offer thin vapor barriers with a minimal 6-mil thickness. These insufficient liners are prone to tears, moisture, mold, and other damage.
  • Implementing DIY Solutions: Many DIY solutions provide temporary relief and do not address the underlying causes of crawl space foundation problems. Since crawl space areas are limited and often store essential HVAC systems, plumbing, and ductwork, it’s best to rely on professionals for repair. Crawl space foundations can also harbor unsafe conditions like mold and pests, making it challenging and hazardous to navigate alone. Professionals have the expertise and safety gear to provide thorough crawl space inspections and repairs.

Tips to Consider:

  • Manage Exterior Drainage: Exterior gutters and downspouts are your first defense against water and moisture infiltration. Inspect and clean these systems at least twice yearly – in the spring and fall. Ensure downspouts and the extensions angle downward and away from the foundation to prevent water pooling. Landscape and yard grading should also slope down and away from the house to ensure proper water flow. 
  • Do Not Navigate the Crawl Space: Crawl space foundations are typically one to three feet high, making navigation challenging. Crawl spaces often store essential fixtures like plumbing pipes and HVAC equipment and harbor hazardous pests and rodents. If you notice signs of damage or the need for crawl space repair, contact a professional to ensure safety.
  • Trust Local Crawl Space Repair Experts: Trusting professionals for crawl space repairs ensures safety and a thorough job. Mount Valley Foundation Services teams are highly trained and experiences in crawl space inspection and problem diagnosis. We install specialized solutions tailored to your home’s needs and your budget.

Providing Expert Crawl Space Repair & Encapsulation in South Carolina, North Carolina, and Georgia

Pennsylvania trusts Mount Valley for reliable basement waterproofing, crawl space, foundation, and concrete repair services. Contact us for a free inspection!  

Top Cities We Serve


Mount Valley Service Map

Our Locations

Augusta Location

630 Ellis Street, Suite 2-B
Augusta, GA 30901

Charleston Location

1850 Ashley River Rd
Charleston, SC 29407

Columbia Location

401 Gamble Dr., Suite B

Columbia, SC 29209

Greenville Location

300 South Ave
Spartanburg, SC 29306

Myrtle Beach Location

1704 N. Oak Street, Suite 3
Myrtle Beach, SC 29577

Savannah Location

6606 Abercorn St., Suite 211
Savannah, GA 31405